Reverse Telecine needs software
On the Mac there is Compressor 3 - part of Final Cut Studio
and there is JES Deinterlacer which is free.
there may be more.
The real problem for you is...
Can you edit a 24p project on FCE? I have not seen a clear answer on that.
The most film-like settings for the HV20 are
24p shooting.
1/48s exposure duration.
Widest possible aperture.
No electronic gain.
Low camera shake (because of the rolling shutter issue) so use a tripod / monopod.
Because the camera is not fully manual, you have to trick the automatic settings into giving you what you want.
There are lots of articles and YouTube videos showing variations on the process.Here is one.
http://www.dvxuser.com/articles/article.php/8
But Google more for yourself.